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General Procedure - Noises, Identifying: Checklist

The checklist or protocol for finding noises is an aid for the workshop to identify and locate noises. This is very helpful for recording data. The technician fills out the first section with the typical user of the vehicle to learn more about the noise in question ahead of time.

Checklist description (guide)

The most important checklist fields are described in this section.

Print the check list. Refer to CHECKLIST .

Checklist description (guide), Section I

GWWE00-11338Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

A -  Vehicle data. Refer to  CHECKLIST1) or  CHECKLIST2)

B -  Vehicle inspection. Refer to  CHECKLIST3) ,  CHECKLIST4) or  CHECKLIST5)

C -  When the noise occurs. Refer to  CHECKLIST6) ,  CHECKLIST7) or  CHECKLIST8)

D -  Possible damage. Refer to  CHECKLIST9)

E -  Locating diagrams. Refer to  CHECKLIST10)

F -  Noise level. Refer to  CHECKLIST11) or  CHECKLIST12)

G -  Type of tone. Refer to  CHECKLIST13) or  CHECKLIST14)

H -  Duration. Refer to  CHECKLIST15) or  CHECKLIST16)

I -  Noise regularity. Refer to  CHECKLIST17)

J -  Noise type descriptions. Refer to  CHECKLIST18) or  CHECKLIST19)

K -  Noise nuance. Refer to  CHECKLIST20)

  1. Item no.: chronological list of accepted cases in the workshop.
  1. Retrofittings: when retrofittings occur after manufacture
  1. Dynamic or static test, during which the applicable noise could be detected
  1. Can the customer complaint be confirmed?
  1. The technician confirms that they could clearly detect and identify the noise questioned by the customer, and that it is currently being considered unusual.
  1. The mileage at which the noise was detected.
  1. If the noise is gradually occurring, is short or is already constantly occurring.
  1. If the noise occurred after a collision or a procedure, such as mechanical repairs, body repair, installing devices, adaptations (tuning), etc.
  1. Possible damage or impairments related to the noise, even if the customer is not aware of them. Perform a vehicle inspection to find these damages or impairments, since they could offer helpful information for the diagnosis.
  1. This diagram is used to mark the area(s) where the noise is believed to occur. Different sections can be marked.
  1. Indicate the decibel if a sound intensity meter is available.
  1. In the vehicle interior with all of the doors and windows closed, mark one of the applicable options - high, medium or low level (volume).
  1. The High, Medium, or Low field is marked based on the type of tone.
  1. Multiple fields can be marked if the tone lies between two of the specifications.
  1. The corresponding field is marked based on the duration.
  1. Multiple fields can be marked if the tone lies between two of the specifications.
  1. Intermittent, if it is a series of noises or isolated, if it is only one noise.
  1. Mark the label that is most similar to the noise.
  1. Multiple fields can be marked if the noise is similar to multiple sounds.
  1. Mark one or more of the nuances that the primary sound makes or just the accompanying, secondary sound.

Checklist description (guide), Section II

GWWE00-11339Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

L -  Under what circumstances does the noise occur (simultaneous events). Refer to  CHECKLIST21) or  CHECKLIST22)

M -  Vehicle speed when the noise occurs and the transmission type. Refer to  CHECKLIST23) or  CHECKLIST24)

N -  Vehicle speed. Refer to  CHECKLIST25)

O -  Engine speed (RPM). Refer to  CHECKLIST26)

P -  Engine operating conditions. Refer to  CHECKLIST27)

Q -  External conditions. Refer to  CHECKLIST28)

R -  Ambient temperature. Refer to  CHECKLIST29)

S -  Road quality. Refer to  CHECKLIST30)

T -  At which seat can the noise be heard the loudest. Refer to  CHECKLIST31)

U -  Can the cause of the noise be located. Refer to  CHECKLIST32) or  CHECKLIST33)

V -  Notes. Refer to  CHECKLIST34) ,  CHECKLIST35) ,  CHECKLIST36) ,  CHECKLIST37) or  CHECKLIST38)

  1. Start by marking if the noise is heard constantly, frequently, rarely or very rarely.
  1. Then mark the circumstance or circumstances, under which the noise occurs. In case the corresponding circumstance is not listed, note this in the "Other circumstances" field and describe.
  1. Specification of the transmission type installed, automatic or manual transmission.
  1. Mark the gear or gears in which the noise is detected.
  1. Specify the speed range at which the noise occurs by marking multiple fields for the start and end point.
  1. Specify the engine speed range at which the noise occurs by marking multiple fields for the start and end point.
  1. Mark the engine operating condition(s) at which the noise is detected.
  1. Mark the climate condition(s) in which the noise is detected.
  1. Mark the ambient temperature(s) at which the noise occurs.
  1. Mark the road condition(s) at which the noise occurs.
  1. Mark the seat at which the noise can be the most clearly heard.
  1. The technician will give their preliminary diagnosis after filling out the list.
  1. If none of the fields apply, mark "Other" and describe in "Which?".
  1. To record data accurately, it is necessary that the typical vehicle driver is present when filling out the first section of the checklist.
  1. Recording data with the driver can be done by the technician or the service manager. The technician who will be performing the procedures on the vehicle will complete the checklist.
  1. To obtain specific information, the technician must leave any applicable questions open-ended, so that the noise can be diagnosed correctly and without issue.
  1. Likewise, the technician must explain to the customer the reasons for the questions previously asked and then inform them of any procedures to be conducted on the vehicle, so that they can give their consent.
  1. By using the checklist correctly, the technician can determine the different operating conditions of the vehicle, under which the noise could be occurring. To determine the area or component that is creating the noise, the vehicle history should be noted, the acoustic properties of the noise should be analyzed and the order previously specified should be followed.
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